What Is The Cause And Treatment For Pain On Thighs?

hello doctor my motherinlaw is 63 years old and she was seen by the doctoe today for her constant muscular pain on her right thigh. She has gone through the boold test andf various x-rays for her spine and knee joints . everything was fine . but the doctoe has suggested MIR test and prescribed her some tab as below LOrnasafe plus, triplecal and Mecosule please advice me how this is going to help my mother in law for the constant muscular pain on her thigh's.